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SCA3 presenting as an isolated axonal polyneuropathy.

Tracey D Graves¹, Roberto J Guiloff

¹Neuromuscular Unit, West London Neurosciences Centre, Imperial College Healthcare NHS Trust, Charing Cross Hospital, Fulham Palace Road, London, United Kingdom.

Archives of Neurology

|May 11, 2011

Summary

This summary is machine-generated.

Spinocerebellar ataxia type 3 (SCA3) can initially present as an isolated axonal polyneuropathy. This rare presentation highlights the diverse clinical spectrum of SCA3, emphasizing the need for genetic testing.

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A Simple Composite Phenotype Scoring System for Evaluating Mouse Models of Cerebellar Ataxia

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Published on: May 21, 2010

Area of Science:

Neurogenetics
Neurology
Clinical Medicine

Background:

Spinocerebellar ataxia type 3 (SCA3), also known as Machado-Joseph disease, is an autosomal dominant neurodegenerative disorder.
It is characterized by progressive cerebellar ataxia, but extraneurological and atypical neurological manifestations are increasingly recognized.

Observation:

A middle-aged man with no family history of SCA3 presented with a 6-year history of isolated axonal, distal, symmetric, sensorimotor polyneuropathy.
This neuropathy preceded the development of a classic cerebellar syndrome.

Findings:

The patient's presentation mimicked common peripheral neuropathies for an extended period.
Genetic testing confirmed SCA3, revealing an unusual initial phenotype.

Implications:

This case underscores that SCA3 should be considered in the differential diagnosis of isolated axonal polyneuropathy, even without a family history.
Recognizing atypical presentations is crucial for timely diagnosis and management of SCA3.